A lot of packages are still not supported in ros noetic, so i was trying to build melodic from source in ubuntu 20.04. While following instructions from here, i got stuck in this command rosdep install --from-paths src --ignore-src --rosdistro melodic -y
The errors i got were:-
ERROR: the following packages/stacks could not have their rosdep keys resolved to system dependencies:
laser_geometry: No definition of [python-numpy] for OS version [focal]
genpy: No definition of [python-yaml] for OS version [focal]
gencpp: No definition of [python-setuptools] for OS version [focal]
python_orocos_kdl: No definition of [python-sip] for OS version [focal]
I understand that these are because ubuntu 20.04 doesnt have python in it. So i tried doing
alias python=python3
in my bashrcsudo update-alternatives --install /usr/bin/python python /usr/bin/python3 10
but i still receive these errors. How to resolve these issues? Even if i sudo apt-get install
all these packages, still these erros are present.